Building green in New York City just got a whole lot easier. The New York City Council has updated some archaic zoning laws, enabling energy efficient and solar-powered buildings to be constructed with ease. Citywide zoning regulations, called Zone Green, will now allow for both rooftop solar systems, as well as wind turbines to be more easily installed by cutting permit costs and eliminating bureaucratic red tape. The new ordinances are expected to save $15 billion in energy costs.